Eric Posner is Kirkland and Ellis Distinguished Service Professor of Law at the Law School of the University of Chicago. His current research interests are international law and constitutional law. He is Professor at the University of Chicago since 1998 after being Attorney adviser at Office of Legal Counsel at the U.S. Department of Justice and Assistant professor at the University of Pennsylvania. Several of his books and articles focus on environment and climate change such as: Climate Change Justice (Princeton, 2010), Climate Regulation and the Limits of Cost-Benefit Analysis (California Law Review, 1999), Should Greenhouse Gas Permits Be Allocated on a Per Capita Basis? (California Law Review, 2009), and The Ethics of Climate Change (31 Regulation 14, 2008).